EN ISO 527-2:1996 pdf free download.Plastics — Determination of tensile properties — Part 2: Test conditions for moulding and extrusion plastics.
1.1 This part of ISO 527 specifies the test conditions for determining the tensile properties of moulding and extrusion plastics, based upon the general principles given in Iso 527-1.
1.2 The methods are selectively suitable for use with the following range of materials:
— rigid and semirigid thermoplastics moulding, extrusion and cast materials, including compounds filled and reinforced by e.g. short fibres, small rods, plates or granules but excluding textile fibres
(see ISO 527-4 and ISO 527-5) in addition to unfilled types;
— rigid and semirigid thermosetting moulding
and cast materials, including filled and
reinforced compounds but excluding textile fibres
as reinforcement (see ISO 527.4 and ISO 527.5);
— thermotropic liquid crystal polymers.
The methods are not suitable for use with materials reinforced by textile fibres
(see ISO 527-4 and ISO 527-5), with rigid cellular materials or sandwich structures containing cellular material.
1.3 The methods are applied using specimens which may be either moulded to the chosen dimensions or machined, cut or punched from injection- or compression-moulded plates. The multipurpose test specimen is preferred (see ISO 3167:1993. Plastics — Multipurpose test specimens).
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO 527. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO 527 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards.
ISO 37:1977, Rubber, vulcanized Determination of tensile stress-strain properties.
ISO 293:1986, Plastics — compression moulding test specimens of thermoplastic materials. ISO 294:—, Plastics — Injection moulding of test specimens of thermoplastic 1)
ISO 295:1991, Plastics — compression moulding of test specimens of thermosetting materials.
Iso 527-1:1993, Plastics — Determination of tensile properties — Part 1: General principles.
ISO 1926:1979. Cellular plastics — Determination of tensile properties of rigid materials.
150 2818:—, Plastics —Preparation of test specimens by machining2.
3 Principle
See ISO 527-1:1993, clause 3.
4 Definitions
For the purposes of this part of ISO 527, the
definitions given in ISO 527-1 apply.
5 Apparatus
See ISO 527-1:1993, clause 5.
6 Test specimens
6.1 Shape and dimensions
Wherever possible, the test specimens shall be dumb-bell-shaped types 1A and lB as shown in Figure 1. Type 1A is preferred for directly-moulded multipurpose test specimens. type 1 B for machined specimens.
NOTE 1 Types IA and lB test specimens having 4 mm thickness are identical to the multipurpose test specimens according to ISO 3167. types A and B, respectively.
For the use of small specimens, see Annex A.
6.2 Preparation of test specimens
Test specimens shall be prepared in accordance with the relevant material specification. When none exists, or unless otherwise specified, specimens shall be either directly compression- or injection moulded from the material in accordance with ISO 293, ISO 294 or ISO 295, as appropriate, or machined in accordance with ISO 2818 from plates that have been compression- or injection-moulded from the compound.
All surfaces of the test specimens shall be free from visible flaws, scratches or other imperfections. From moulded specimens all flash, if present, shall be removed, taking care not to damage the moulded surface.
Test specimens from finished goods shall be taken from flat areas or zones having minimum curvature. For reinforced plastics, test specimens should not be machined to reduce their thickness unless absolutely necessary. Test specimens with machined surfaces will not give results comparable to specimens having non-machined surfaces.
6.3 Gauge marks
See ISO 527-1:1993, subclause 6.3.
6.4 Checking the test specimens
See ISO 527-1:1993, subclause 6.4.
7 Number of test specimens See ISO 527-1:1993, clause 7.
8 Conditioning
See ISO 527-1:1993, clause 8.
9 Procedure
See ISO 527-1:1993, clause 9.
For the measurement of the modulus of elasticity, the speed of testing shall be 1 mm/mm for specimen types lAand 1B(see Figure 1). For small specimens see Annex A.
10 Calculation and expression of
results
See ISO 527-1:1993, clause 10.
11 Precision
The precision of this test method is not known. because interlaboratory data are not available. When interlaboratory data are obtained, a precision statement will be added with the next revision.
12 Test report
The test report shall include the following information:
a) a reference to this part of ISO 527, including the type of specimen and the testing speed according to:
TensiLe test ISO S27-2/IA/SO
Type of specimen
(see flgure 1)
Testing speed, In miLLimetres per minute — (see ISO 527-1: 1992, tabLe 1)
For items b) to q) in the test report, see ISO 527-1:1993, 12 b) to q).